busbar(n = noun.artifact) bus - an electrical conductor that makes a common connection between several circuits; "the busbar in this computer can transmit data either way between any two components of the system"
is a kind of conductor
is a part of computer, computing device, computing machine, data processor, electronic computer, information processing system, lan, local area network, power plant, power station, powerhouse

   an electrical conductor that makes a common connection between several circuits. [WordNet 1.5]

busbar, n. Electr. a system of conductors in a generating or receiving station on which power is concentrated for distribution.